Black crow was stuck after a stun

Yesterday we fight against "The Black Crow" and stun him during the animation where he grabs the bell.
After the stun he just stand there and did nothing, we also couldnt finish him.

Happend during a Map with two players.

Also noticed that a party member can create a Portal during the Boss fight while the host cant do it.

Had something similiar happen to The Black Crow map boss in Blooming Fields map. Boss had delirium mod Conflagrating Path interrupting the bell pickup animation during phase. I could reset the boss after portaling out and going back into the map

Same thing happened to me just now in a level 82 Blooming Field. He's just standing there not doing anything.

I play spark stormweaver, so like above player expressed it probably had to do with a stun interrupting him in his action.

Picture: https://imgur.com/a/jaOaHJE

Tried porting in and out etc, still can't kill him as he cannot be brought below a certain percent in this first phase. :/

Same here, stunned the boss in a 2 player party and was just standing besides the door with half HP and invincible. Map could not be completed.